3 types of straight lines used in haircutting - horizontal, vertical, diagonal the body's ability to destroy and resist pathogens - immunity cape types in barbering - shampoo (waterproof) and haircutting Cost for a Class A Barber certificate and renewal - $55 How often the Class A barber certificate is renewed - every 2 years the process that destroys all microbial life including spores - sterilization in this cut, all hair strands are cut to the same length at a 90 degree elevation, straight out from where the hair grows - uniform-layered cut single-process haircolor - deposits color and lightens at the same time loose skin tends to do this, and can result in nicks or cuts - push out in front of the razor in a perm, this placement results from wrapping the hair at a 45 degree angle below the perpendicular (or 90 degree) base - off-base